Gregory S. Williams has been granted 10 US patents while listed as an inventor at Amoco . The first was granted in 1990 and the most recent in March 1995. Gregory S. Williams ranks #481,000 of 4,157,543 US inventors in our database (top 11.6%). Patent records list Gregory S. Williams in Naperville, IL, US.
Patents per Year Patents granted per year, 1990 to 1995 Bar chart with a peak of 5 patents in 1991. peak 5 1990: 2 patents 1990 1991: 5 patents 1991 1992: 1 patents 1992 1994: 1 patents 1994 1995: 1 patents 1995
Issued Patents All Time
Profile Widget
Showing 1–10 of 10 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
5401892 Preparation of a dimethyltetralin by cyclizing an orthotolylpentene phenylhexene using an ultra-stable crystalline aluminosilicate molecular sieve y-zeolite David L. Sikkenga , Ian C. Zaenger , Joyce D. Lamb 1995-03-28
$35,988,000
5284987 Preparation of a dimethyltetralin in a distillation reactor David L. Sikkenga , Ian C. Zaenger 1994-02-08
$122,848,000
5118892 Preparation of a dimethylnaphthalene David L. Sikkenga , Ian C. Zaenger 1992-06-02
$22,405,000
5073670 Preparation of a dimethyltetralin David L. Sikkenga , Joyce D. Lamb , Ian C. Zaenger 1991-12-17
$22,377,000
5034561 Catalytic alkenylbenzene cyclization David L. Sikkenga , Ian C. Zaenger 1991-07-23
$74,797,000
5030781 Preparation of a dimethyltetralin David L. Sikkenga , Ian C. Zaenger 1991-07-09
$29,334,000
5012024 Preparation of a dimethylnaphthalene David L. Sikkenga , Ian C. Zaenger 1991-04-30
$22,076,000
4999326 Palladium catalyst reactivation David L. Sikkenga , Ian C. Zaenger 1991-03-12
$147,162,000
4962260 Preparation of a dimethylnaphthalene David L. Sikkenga , Ian C. Zaenger 1990-10-09
$37,192,000
4950825 Preparation of a dimethyltetralin David L. Sikkenga , Joyce D. Lamb , Ian C. Zaenger 1990-08-21
$26,072,000